KR100672653B1 - Backlight unit and liquid crystal display device having the same - Google Patents

Abstract

The present invention is to provide a backlight unit and a liquid crystal display device having the same suitable for preventing the occurrence of problems caused by deterioration of heat dissipation performance by placing the inverter horizontally, the backlight unit for achieving the above object is the electrode at both ends of the tube A lamp unit having a plurality of light emitting lamps; And an inverter disposed in a horizontal direction on a rear surface of the lamp unit to apply power to the light emitting lamp.

The inverter may include an inverter PCB disposed in a horizontal direction under the lamp unit rear surface, and a plurality of transformers and inverter elements arranged in a horizontal direction on the inverter PCB.

Backlight, inverter,

Description

BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME}

1 is a perspective view of a direct type backlight unit according to the prior art;

2 is a view illustrating a power lead wire connected to a conventional light emitting lamp and a connector;

3 is a perspective view of a direct backlight unit according to another conventional technology

Figure 4 is a layout view of the inverter back of the direct type backlight unit according to the prior art

5A and 5B are exploded perspective views of a direct type backlight unit and a liquid crystal display device having the same according to the present invention.

6 is a layout view of the inverter on the back of the direct backlight unit according to the embodiment of the present invention;

7a and 7b is a simulation showing the temperature distribution according to the prior art and the inverter arrangement of the present invention

Explanation of symbols on the main parts of the drawings

100: top chassis 200: liquid crystal display panel assembly

210: liquid crystal display panel 211: TFT substrate

213: color filter substrate 220: data flexible printed circuit

230: gate flexible printed circuit

250: data printed circuit board 260: gate printed circuit board

300: each chassis 400: backlight unit

430 diffusion plate 440 diffusion sheet

460: lamp unit 500a, 500b: first and second inverter PCB

501: transformer 531: luminous lamp

533 and 533a: electrodes 541a and 541b: first and second lower mechanisms

543a, 543b: first and second upper appliances

545: groove 547a, 547b, 547c, 547d: conductive layer

591a, 591b, 591c: Lower support 600: Wire

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit, and more particularly, to a backlight unit and a liquid crystal display device having the same, which can prevent a problem caused by deterioration of heat dissipation performance by changing an arrangement of an inverter.

CRT (Cathode Ray Tube), one of the commonly used display devices, is mainly used for monitors such as TVs, measuring devices, and information terminal devices.However, due to the weight and size of the CRT itself, Could not respond actively to demands.

Therefore, in the trend of miniaturization and light weight of various electronic products, CRT has a certain limit in weight and size, and is expected to replace the liquid crystal display (LCD) and gas discharge using electro-optic effects. Plasma Display Panels (PDPs) and Electro Luminescence Displays (ELDs) using electroluminescent effects are used. Among them, research on liquid crystal displays is being actively conducted.

In order to replace the CRT, liquid crystal display devices having advantages such as small size, light weight, and low power consumption have been actively developed. Recently, the liquid crystal display device has been developed enough to perform a role as a flat panel display device. As it is used for a monitor of a desktop computer and a large information display device, the demand for a liquid crystal display device is continuously increasing.

Since most of the liquid crystal display devices are light-receiving devices that display images by controlling the amount of light coming from the outside, a separate light source for illuminating the LCD panel, that is, a backlight unit, is necessary.

In general, the backlight unit used as the light source of the liquid crystal display device is a method of disposing a cylindrical fluorescent lamp, and is divided into an edge method and a direct method.

First, the edge method is that the lamp unit is installed on the side of the light guide plate for guiding the light, the lamp unit is a lamp that emits light, the lamp holder which is inserted at both ends of the lamp to protect the lamp and the outer peripheral surface of the lamp and one side It is provided with a lamp reflection plate fitted to the side of the light guide plate to reflect the light emitted from the lamp toward the light guide plate.

The edge method in which the lamp unit is installed on the side of the light guide plate is applied to a relatively small liquid crystal display device such as a monitor of a laptop computer and a desktop computer, and has good light uniformity and a long durability life. It is advantageous to thin the liquid crystal display device.

On the other hand, the direct method began to be developed mainly as the size of the liquid crystal display device became larger than 20 inches, and arranged a plurality of lamps in a row on the lower surface of the diffuser plate to direct light directly to the front of the LCD panel. will be.

The direct method is mainly used for a large screen liquid crystal display device requiring high luminance because the light utilization efficiency is higher than that of the edge method.

However, the liquid crystal display device adopting the direct method is used as a large monitor or a television, and it takes longer to use than a laptop computer, and the number of lamps is larger. It is more likely that a lamp that will not turn on will appear due to the failure and life of the lamp in the display.

The light source of the liquid crystal display device of the edge method and the direct method is EL (Electro Luminescence), LED (Light Emitting Diode), CCFL (Cold Cathode Fluorescent Lamp), HCFL (Hot Cathode Fluorescent Lamp), EEFL (External Electrode Fluorescent Lamp) ) Can be used.

Hereinafter, the backlight unit of the direct type according to the prior art will be described.

1 is a perspective view of a backlight unit of a direct method according to the prior art, Figure 2 is a view showing a power lead wire connected to a conventional light emitting lamp and a connector.

As shown in FIG. 1, the backlight unit according to the related art includes a plurality of light emitting lamps 1, an outer case 3 for fixing and supporting the light emitting lamps 1, and the light emitting lamps ( Light scattering means 5a, 5b, 5c disposed between 1) and a liquid crystal panel (not shown).

The light scattering means (5a, 5b, 5c) is to prevent the shape of the light emitting lamp from appearing on the display surface of the liquid crystal panel and to provide a light source having an overall uniform brightness distribution, in order to enhance the light scattering effect A plurality of diffusion sheets, diffusion plates, and the like are disposed between the cells.

The inner surface of the outer case 3 is disposed with a reflector 7 so that the light emitted from the light emitting lamp 1 can be concentrated to the display unit of the liquid crystal panel, which is to maximize the utilization efficiency of the light.

The light emitting lamp 1 is composed of a cold cathode lamp (CCFL), as shown in FIG. 2, and electrodes 2 and 2a are disposed at both ends of a tube. When power is applied to 2 and 2a, the light is emitted, and both ends of the light emitting lamp 1 are fitted in grooves formed on both sides of the outer case 3 as shown in FIG.

Power leads 9 and 9a for transmitting power for driving the lamp are connected to both electrodes 2 and 2a of the light emitting lamp, and the power leads 9 and 9a are connected to a separate connector 11 to drive a drive circuit. Although connected to the furnace, a separate connector 11 is required for each light emitting lamp 1.

That is, as shown in FIG. 2, the power lead wire 9 connected to one electrode 2 of the light emitting lamp and the power lead wire 9a connected to the other electrode 2a are connected to one connector 11, and the power lead wire ( Any one of 9 and 9a is bent to the bottom of the outer case 3 and connected to the connector 11.

However, such a conventional backlight unit for a liquid crystal display device has a connector connected to a power supply lead of a light emitting lamp and connected to a driving circuit. Since the connector is individually required for each light emitting lamp, wiring is complicated and the purpose of reducing the thickness of the backlight unit is reduced. By connecting the connector to the connector by bending the power lead line, not only the work efficiency is lowered, but also a separate work is required for this, which increases the process time and decreases the productivity.

In addition, in order to connect the electrode and the connector, a hole penetrating the outer case must be drilled and both electrodes of the light emitting lamp must be inserted into the hole so that both electrodes of the light emitting lamp are exposed to the outside of the outer case. Falling and maintenance of the luminous lamp is difficult.

Next, a direct backlight unit according to another conventional technique will be described.

3 is a perspective view of a backlight unit of a direct type according to another conventional technology, and FIG. 4 is a layout view of an inverter rear side of the backlight unit of a direct type according to another conventional technology.

As shown in FIG. 3, the backlight unit according to another related art includes a plurality of light emitting lamps 31 having electrodes 33 and 33a formed at both ends of the outside of the tube; The first and second lower mechanisms 41a and 41b are arranged at predetermined intervals in accordance with the length of the light emitting lamp and have a plurality of grooves 45 formed on one surface thereof to accommodate both ends of the plurality of light emitting lamps 31. And lower support portions 91a, 91b, 91c formed on the side and a space defined by the first and second lower mechanisms 41a, 41b to support the first and second lower mechanisms 41a, 41b. ; Fixing and supporting the light emitting lamp 31 together with the first and second lower mechanisms 41a and 41b, the grooves 45 being arranged at the same intervals as the first and second lower mechanisms 41a and 41b and being the same. A first and a second upper mechanism (43a, 43b) formed; A conductive layer 47a formed in one direction along the grooved surface of the first and second lower mechanisms 41a and 41b and the first and second upper mechanisms 43a and 43b to apply power to the light emitting lamp; 47b, 47c, 47d).

In order to apply power to the electrodes of both ends of the light emitting lamp 31, the first and second inverter PCB (50a, 50b) is provided to have a vertical structure on both sides of the lower support (91a), the first On the second inverter PCBs 50a and 50b, transformers 51a and 51b are sequentially arranged in the height of the lower part of the inverter, and various inverter elements are distributed in the outer region thereof.

In general, two or more light emitting lamps may be connected to and driven by one transformer. FIGS. 3 and 4 illustrate examples of driving four light emitting lamps per one of the transformers 51a and 51b. Four transformers 51a and 51b were provided on each of the two rear surfaces of the lower support portion 91a.

In general, the inverter generates a current and a voltage to drive a light emitting lamp, and serves to convert a direct current into an alternating current. The transformer 51a and 51b among components constituting the inverter when the above operation is performed. ) Produces the most heat.

Since the transformers 51a and 51b dissipate the most heat when driving the inverter as described above, if the transformers are sequentially arranged in the height direction at the bottom of the inverter PCB as in the prior art, the air at the bottom is moved upward by the natural convective upward flow. The air heated by the high heat generating transformers 51a and 51b rises and heats up the inverter elements scattered upward, thereby extremely reducing the inverter heat dissipation performance.

In addition, since the temperature of the transformer 51b disposed above is increased by the heated air that rises and flows higher than the lower transformer 51a, the heat dissipation performance may be further reduced.

As described above, when the heat dissipation performance of the inverter is deteriorated, a thermal load may increase in the inverter, thereby causing a problem that the tube current of the light emitting lamp is increased.

In addition, although not shown in the drawings, when the inverter shield cover shield is mounted, the deterioration of the inverter heat dissipation performance is further exacerbated so that the inverter elements are raised above the rated temperature, thereby reducing the operating reliability of the inverter.

The present invention has been made to solve the above problems, an object of the present invention is to provide a backlight unit and a liquid crystal display device having the same suitable for preventing the occurrence of problems caused by the heat dissipation performance by placing the inverter horizontally. .

According to an aspect of the present invention, there is provided a backlight unit including: a lamp unit including a plurality of light emitting lamps provided with electrodes at both ends of a tube; And an inverter disposed in a horizontal direction on a rear surface of the lamp unit to apply power to the light emitting lamp.

The inverter may include an inverter PCB disposed in a horizontal direction under the lamp unit rear surface, and a plurality of transformers and inverter elements arranged in a horizontal direction on the inverter PCB.

The lamp unit includes a plurality of light emitting lamps having electrodes formed on both ends of the outside of the tube; First and second lower mechanisms having a plurality of grooves disposed at predetermined intervals in accordance with a length of the light emitting lamp and configured to accommodate both ends of the plurality of light emitting lamps on one surface thereof; Lower support portions formed on the side and a space defined by the first and second lower mechanisms 541a and 541b to support the first and second lower mechanisms; First and second upper utensils for fixing and supporting the light emitting lamp together with the first and second lower utensils, the first and second upper utensils disposed at the same interval as the first and second lower utensils and having the same grooves; And a plurality of conductive layers formed along a surface on which the first and second lower mechanisms and the grooves of the first and second upper mechanisms are formed.

A wire is further connected between the inverter and the conductive layer.

The inner surface of the first and second lower mechanism and the lower support portion is characterized in that it further comprises a reflective plate formed of a synthetic resin having excellent light reflection ability, or by coating a separate reflective material.

It characterized in that it further comprises a light scattering means consisting of a diffusion plate and a diffusion sheet on the lamp unit.

A liquid crystal display device having a backlight unit having the above configuration includes a liquid crystal display panel assembly; A lamp unit having a plurality of light emitting lamps provided with electrodes at both ends of the tube, and an inverter disposed in a horizontal direction on a rear surface of the lamp unit to apply power to the light emitting lamp; A backlight unit; And an upper chassis and an intermediate chassis disposed on the upper and lower portions of the liquid crystal display panel assembly.

The inverter may include an inverter PCB disposed in a horizontal direction under the lamp unit rear surface, and a plurality of transformers and inverter elements arranged in a horizontal direction on the inverter PCB.

Hereinafter, a backlight unit and a liquid crystal display device having the same according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

5A and 5B are exploded perspective views of a direct type backlight unit and a liquid crystal display device having the same according to the present invention.

6 is a layout view of an inverter on the rear surface of the direct type backlight unit according to the exemplary embodiment of the present invention.

As shown in FIGS. 5A and 6, the backlight unit 400 according to an exemplary embodiment of the present invention supplies power to the diffusion plate 430, the diffusion sheet 440, the lamp unit 460, and the lamp unit 460. It is composed of an inverter for applying.

At this time, the diffusion plate 430 and the diffusion sheet 440 is a light scattering means, to prevent the shape of the light emitting lamp from appearing on the display surface of the liquid crystal panel and to provide a light source having a uniform brightness distribution as a whole, the light scattering effect In order to improve the quality, the liquid crystal display panel 210 (see FIG. 5B) is disposed between the lamp unit 460.

The lamp unit 460 may include a plurality of light emitting lamps 531 having electrodes 533 and 533a formed at both ends outside the tube; The first and second lower mechanisms having a plurality of grooves 545 are disposed at predetermined intervals (L) in accordance with the length of the light emitting lamp and have a plurality of grooves 545 formed on one surface thereof to accommodate both ends of the plurality of light emitting lamps 531. 541a and 541b and the space defined by the first and second lower mechanisms 541a and 541b to support the first and second lower mechanisms 541a and 541b and the lower supports 591a formed on the side thereof. 591b, 591c); Fixing and supporting the light emitting lamp together with the first and second lower mechanisms 541a and 541b and disposed at the same interval L as the first and second lower mechanisms 541a and 541b and having the same groove 545. The first and second upper mechanisms 543a and 543b formed); Conductive layers 547a and 547b formed on the grooved surfaces of the first and second lower mechanisms 541a and 541b and the first and second upper mechanisms 543a and 543b, respectively, to apply power to the light emitting lamp. 547c, 547d).

In addition to the above configuration, the inner surfaces of the first and second lower mechanisms 541a and 541b and the lower support portions 591a, 591b and 591c may be provided so that the light emitted from the light emitting lamp 531 may be concentrated and irradiated to the liquid crystal display panel. It is formed of a material having excellent light reflecting ability, for example, a synthetic resin having excellent light reflecting ability to perform a function of a reflecting plate, or the first and second lower mechanisms 541a and 541b and the lower support portions 591a, 591b, and 591c. It can be configured by coating a separate reflective material on the inner surface of the).

In addition, the first lower mechanism 541a and the second lower mechanism 541b may be configured to be separated from each other at a predetermined interval.

The inverter for applying power to the lamp unit 460 is the first and second inverter PCB (500a) disposed in the horizontal direction on the lower surface of the lower surface of the lamp unit 460, that is, both sides of the lower rear of the lower support portion (91a) 500b, a plurality of transformers 501 arranged in a horizontal direction on each of the first and second inverter PCBs 500a and 500b arranged in a horizontal direction, and a plurality of inverter elements It is.

A wire 600 is connected between each of the first and second inverter PCBs 500a and 500b and the conductive layers 547a and 547c to apply power to the electrodes across the light emitting lamps 531. .

As such, the wires connecting the first and second inverter PCBs 500a and 500b and the conductive layers 547a and 547c are horizontally disposed since they are not affected by the length of the inverter PCB vertically or horizontally. There is no design problem with the layout.

The light emitting lamps 531 are composed of an external electrode fluorescent lamp (EEFL) having electrodes 533 and 533a formed at both ends of the outside of the tube.

Such light emitting lamps 531 are driven by connecting two or more lamps to one transformer.

In this way, when two or more lamps are connected to one transformer and driven, the temperature may increase due to a heavy load on the transformer.

The present invention relates to a horizontal arrangement structure for minimizing the temperature rise of the inverter elements by eliminating thermal interference of the high heat generation transformer. Hereinafter, the first and second inverter PCBs 500a and 500b are disposed under the lamp unit 460. The reason for the horizontal arrangement and the reason why the transformers 501 and the inverter elements are arranged horizontally on the first and second inverter PCBs 500a and 500b will be described.

First, the reason why the first and second inverter PCBs 500a and 500b are horizontally disposed under the lamp unit 460 is that the first and second inverter PCBs 500a and 500b are arranged vertically on the rear surface corresponding to both electrodes of the light emitting lamp 531. When the first and second inverter PCBs 500a and 500b are disposed, the temperature rises of the first and second inverter PCBs 500a and 500b are increased as the electrodes at both ends of the light emitting lamp are heated to prevent this.

Next, the transformers 501 and the inverter elements are horizontally arranged on the first and second inverter PCBs 500a and 500b so that the transformers 501 and the inverter elements arranged horizontally may radiate independently. This is to prevent the increase in temperature of the transformer 501 and the inverter elements even if a natural convective upward flow occurs by the heated transformer 501.

As described above, when the first and second inverter PCBs 500a and 500b and the transformer 501 are horizontally arranged, heat may be efficiently radiated.

Hereinafter, comparing the results of simulating the temperature of the transformer and the inverter elements according to the structure of the inverter arrangement of the prior art and the present invention will be described.

7A and 7B are simulation diagrams showing a temperature distribution according to the prior art and the inverter arrangement structure of the present invention.

The simulation was carried out at room temperature 25 ℃, using an inverter having a conversion efficiency of 95%.

First, Figure 7a is a measure of the temperature of each transformer and the inverter element of the conventional inverter in which the inverter is vertically arranged, the transformer at the bottom is measured at 88 ℃ when the transformer is vertically placed on the inverter PCB, the upper transformer Was measured at 91 ° C. In other words, when the transformer is placed vertically, the temperature of the upper transformer is higher than that of the lower transformer due to natural convective upward flow phenomenon. At this time, the temperature of the inverter elements disposed on the transformer was measured at 50 ℃ and 49 ℃, respectively.

Next, Figure 7b is a measure of the temperature of each transformer and the inverter element of the inverter of the present invention in which the inverter is arranged horizontally, the transformers arranged horizontally on the inverter PCB was measured at 88.6 ℃. Inverter elements were measured at 45 ° C. and 47 ° C., lower than in the prior art.

As described above, in the present invention, since the transformer and the inverter elements are horizontally arranged in the inverter arranged in the horizontal direction, even if a natural convective upward flow phenomenon occurs, the heat dissipating independently does not affect the neighboring transformer.

In addition, the inverter elements also minimize the contact with the air heated by the transformer serves to suppress the temperature rise of the inverter.

In the liquid crystal display according to the exemplary embodiment of the present invention having the backlight unit having the above-described configuration and features, as shown in FIG. 5B, the intermediate chassis 300 and the liquid crystal display panel assembly 200 are disposed on the backlight unit 400. ) And the top chassis 100 are sequentially provided.

The top chassis 100 and the intermediate chassis 300 are disposed above and below the liquid crystal display panel assembly 200 to fasten and protect the liquid crystal display panel assembly 200.

The liquid crystal display panel assembly 200 is composed of the liquid crystal display panel 210 and the driving circuit devices 250, 260, 220, and 230 again.

The liquid crystal display panel 210 is composed of a TFT substrate 211, a color filter substrate 213, and a liquid crystal layer (not shown) filled therebetween.

The TFT substrate 211 is again composed of a transparent substrate, a thin film transistor, a gate line, a data line and a pixel electrode.

The color filter substrate 213 is again superimposed on the TFT substrate 211 having such a configuration. In this case, the color filter substrate 213 includes R, G, and B pixels formed on the transparent substrate and a common electrode formed over the entire surface of the transparent substrate. At this time, the RGB pixel is formed at a position opposite to each pixel electrode formed on the TFT substrate 211.

In the TFT substrate 211 and the color filter substrate 213 having such a configuration, the liquid crystal is injected to a predetermined thickness between the pixel electrodes and the RGB pixels so as to be aligned to form the liquid crystal display panel 210.

The liquid crystal display panel 210 having the above structure belongs to a row to which a gate signal is applied among thin film transistors arranged in a matrix form by applying a gate signal to a corresponding gate line while a data signal is individually applied to all data lines. As the thin film transistor is turned on, power corresponding to the data signal is applied to the pixel electrode connected to the turned on thin film transistors. When power is applied to the pixel electrode, an electric field change is generated between the pixel electrode and the common electrode, which causes the liquid crystal to change in response to the electric field change. In this case, if there is light that can pass through the liquid crystal, the light passes through the liquid crystal and then passes through the RGB pixel to express a predetermined color.

By repeating the above process for one frame, a desired image is displayed. To realize this, the gate printed circuit board 260 is installed on the gate line via the gate flexible printed circuit 230, and the data line is data flexible. The data printed circuit board 250 is installed through the printed circuit 220.

The gate flexible printed circuit 230, the gate printed circuit board 260, the data flexible printed circuit 220, and the data printed circuit board 250 constitute the driving circuit device described above.

The LCD having the above configuration includes an inverter PCB disposed in the horizontal direction as described with reference to FIGS. 5A and 6 below the top chassis 100, the liquid crystal display panel assembly 200, and the intermediate chassis 300. Since a backlight unit having a transformer and inverter elements arranged horizontally in the inverter PCB and independently radiating heat is provided, it is possible to prevent an increase in temperature even when the transformer of the inverter is heated. The phenomenon of temperature rise can also be prevented.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the above embodiments, but should be defined by the claims.

The backlight unit and the liquid crystal display having the same according to the present invention have the following effects.

First, by horizontally arranging the transformers 501 on the first and second inverter PCBs 500a and 500b, the transformer 501 and the inverter elements are driven even if a natural convective upward flow occurs by the heated transformers 501. Independent heat dissipation prevents the increase in temperature.

Second, by placing the first and second inverter PCBs 500a and 500b horizontally under the lamp unit 460 rear surface, the electrodes of the first and second inverter PCBs 500a and 500b are heated as the electrodes at both ends of the light emitting lamp are heated. The increase in temperature can be prevented. As a result, the operation reliability of the inverter can be secured, and the problem of increasing the tube current of the light emitting lamp according to the conventional inverter temperature rise can be solved.

Third, the temperature rise of the inverter is prevented from being increased, thereby increasing the vertical uniformity of the liquid crystal display.

Claims (8)

A lamp unit having a plurality of light emitting lamps provided with electrodes at both ends of the tube; And an inverter PCB disposed in a horizontal direction under the rear surface of the lamp unit to apply power to the light emitting lamp, and an inverter including a plurality of transformers and inverter elements arranged in a horizontal direction on the inverter PCB. Backlight unit. delete The method of claim 1, The lamp unit includes a plurality of light emitting lamps having electrodes formed on both ends of the outside of the tube; First and second lower mechanisms having a plurality of grooves disposed at predetermined intervals in accordance with a length of the light emitting lamp and configured to accommodate both ends of the plurality of light emitting lamps on one surface thereof; Lower support portions formed on the side and a space defined by the first and second lower mechanisms 541a and 541b to support the first and second lower mechanisms; First and second upper mechanisms for fixing and supporting the light emitting lamp together with the first and second lower mechanisms, the first and second upper mechanisms being disposed at the same interval as the first and second lower mechanisms and having the same grooves formed therein; And a plurality of conductive layers formed along surfaces of the first and second lower mechanisms and the grooves of the first and second upper instruments. The method of claim 3, wherein And a wire is connected between the inverter and the conductive layer. The method of claim 3, wherein And a reflecting plate formed of a synthetic resin having excellent light reflecting ability or a separate reflecting material on the inner surfaces of the first and second lower mechanisms and the lower support part. The method of claim 1, And a light scattering means composed of a diffusion plate and a diffusion sheet on the lamp unit. A liquid crystal display panel assembly; A lamp unit having a plurality of light emitting lamps provided with electrodes at both ends of the tube, and an inverter PCB disposed in a horizontal direction under the back of the lamp unit to apply power to the light emitting lamp; A backlight unit including an inverter including a plurality of transformers and inverter elements arranged in a horizontal direction on the inverter PCB; And a top chassis and an intermediate chassis disposed above and below the liquid crystal display panel assembly. delete

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